The Sacramento Kings campaign, Operation Sellout, sold out the first home game, Nov. 2 against the Memphis Grizzlies. That means the Kings, last in NBA attendance, sold 17,317 tickets for a team that sold out only three games last season. ESPN reported that the Kings averaged 12,571 fans per game, leaving 4,746 seats empty. Mayor Kevin Johnson, an outspoken advocate for keeping the Kings in Sacramento, is involved with the campaign.   “I went to Gavin and Joe Maloof and asked them how I can be helpful,” Johnson said.  “They said the best thing that would help them right now would be to help them sell out the first two home games, get the fans energized, and rekindle some of the energy